On Dec 31 2009, 5:13 pm, davidj411 <davidj...@gmail.com> wrote: > I am not sure why this behavior is this way. > at beginning of script, i want to create a bunch of empty lists and > use each one for its own purpose. > however, updating one list seems to update the others. > > >>> a = b = c = [] > >>> a.append('1') > >>> a.append('1') > >>> a.append('1') > >>> c > ['1', '1', '1'] > >>> a > ['1', '1', '1'] > >>> b > > ['1', '1', '1'] a, b and c are the same objects. You can check the object identity by >>> a = b = c = [] >>> print id(a),id(b),id(c) 3083044140 3083044140 3083044140 >>> a is b is c True
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